One example of a funny birthday wish is "Birthdays are nature’s way of telling us to eat more cake." Another example is "Best wishes on your 21st time having a 29th birthday."
Many funny birthday wishes are for older people and revolve around aging. An example of a funny birthday wish about aging is "Birthdays are like boogers. The more you have, the harder it is to breathe!" Another funny aging birthday message is "At least you’re not as old as you will be next year! Happy Birthday!"
Funny birthday messages can vary between smart and low ball humor. An example of a smart humor wish is "If you could be president today, I think I might switch my political affiliation to the birthday party." A lowball birthday wish could be something like "Wishing you enough air to blow out all of your candles."
Another funny birthday wish is "Getting older and growing up are two very different things. One is still an option." These messages can be used in cards, emails or text messages. However, not everyone has a sense of humor about aging, notes Wishes Messages Sayings. It is advised to use these birthday wishes with caution even if they do not directly insult anyone.